Vulcanized rubber ozone resistant aging box

With the rapid development of modern industrial technology, the application fields of rubber and plastic products are becoming increasingly broad, and the environmental conditions they are subjected to are becoming more and more complex and diverse. Only by reasonably stipulating the environmental conditions of the product and correctly selecting the environmental protection measures for the product can we ensure that the product is protected from damage during storage and transportation and is safe and reliable during use. The content of ozone in the atmosphere is very small, but it is the main factor causing rubber cracks. The ozone aging chamber simulates and strengthens the ozone conditions in the atmosphere, studies the effect of ozone on rubber, and quickly identifies and evaluates the anti-ozone aging performance of rubber and anti-ozonant agents. Protective efficiency methods, and then take effective anti-aging measures to improve the service life of rubber products. The imported ozone generator used in the equipment adopts medium frequency and high voltage power supply, and the quartz glass tube electrode is welded. The ozone concentration generated is stable. It is mixed with a certain amount of treated air in the exchanger and sent to the test chamber. The ultraviolet ozone concentration is used. The detector will feedback the continuously detected ozone concentration online to the ozone generator control system, so that the control system can effectively control the generation of ozone according to the set value, so that the test chamber maintains an appropriate ozone concentration. The control system adopts programmable controller. In addition, the heating and humidification system works to meet all temperature and humidity test conditions.
Ozone aging test equipment can be used for rubber products such as vulcanized rubber, thermoplastic rubber, cable insulation sheaths and other products, under static stretching or continuous dynamic stretching deformation, or under intermittent dynamic stretching and static stretching Under alternating deformation, the sample is exposed to a closed, non-illuminated air containing constant ozone concentration and a constant temperature test chamber. The sample is tested at a predetermined time to evaluate the degree of cracks or other performance changes that occur on the surface of the sample. Ozone aging resistance of rubber.
Static tensile test
The standard stipulates that the two ends of the sample are clamped on special clamps, and an elongation rate is selected for stretching. Generally, the clamp is installed on a rotating sample rack, and the sample rack rotates at / During the period, the test is carried out at a temperature of ℃ and a relative humidity not greater than the specified ozone concentration. After the specified time, check the cracks of the sample. General ozone concentration selection - .
Dynamic Tensile Test
The standard stipulates that the sample fixture can automatically expand and contract to stretch and reset the sample. The stretching frequency is.. Clamp both ends of the sample on the special fixture to make the sample from elongation to The clamp is mounted on a rotating sample rack, and the sample rack rotates at a speed between and reset and rotate together with the sample holder for testing. After the specified time, check the cracks of the sample. General ozone concentration selection - .
Dynamic tensile testing is divided into continuous dynamic stretching and intermittent dynamic stretching.
Reference and implementation standards
B/ Dynamic tensile test method for ozone aging resistance test of vulcanized rubber
B/ - Static tensile test method for ozone crack resistance of vulcanized rubber or thermoplastic rubber
B/ General test methods for cable insulation and sheath materials
and test methods specified in other relevant standards.
Main technical parameters
. Model studio size () Overall dimensions () Power






. Temperature range: R+℃～℃
. Temperature uniformity: ℃
. Temperature fluctuation: .℃ /
. Temperature deviation: ℃
. Time setting range: ~ hours
. Ozone concentration: ~ ~
. UV detection probe, long life, high accuracy
. Sample rack speed: (adjustable)
. The same specimen rotates once The time is
. Ozonated air flow rate:
. Clamp elongation ~ 3
3. Power supply voltage
Introduction to structural design
Ozone aging test equipment uses high-quality materials , the shell surface is spray-coated, beautiful and smooth. The colors are coordinated and the lines are smooth. The inner tank is designed to be a closed space without direct light when working. It can place samples for aging tests. It can constantly control the test temperature difference in degrees Celsius. It is made of imported high-quality stainless steel plates. Indoor sample racks, clamps, conduits and other accessories are made of stainless steel, aluminum and other materials that are not easily decomposed by ozone and affect ozone concentration. The lifting height, frequency and amplitude of the dynamic sample rack can be adjusted. The sample holder can be rotated 3 degrees and the rotation speed is adjustable.
A transparent window is set at a reasonable position on the door of the chamber to observe changes in the indoor sample. The observation window is made of multi-layer hollow tempered glass, which has the advantages of transparency, heat insulation, and resistance to steam frosting.
The interlayer between the liner and outer shell of the equipment is filled with high-density fiberglass wool to ensure that the box will not cause excessive temperature fluctuations due to temperature conduction, so that the temperature of the sample remains constant during the test.
The equipment uses a long-axis fan motor for stirring, and a stainless steel multi-wing impeller that is resistant to high and low temperatures to achieve strong convection and vertical diffusion circulation, making the temperature in the laboratory uniform and stable.
Double-layer high-temperature-resistant high-tensile sealing strips are used between the door and the box to ensure the sealing of the test area. Reaction-free door handles make operation easier. Set one or more test holes at a reasonable position on the left side of the box, which can be used to connect external test power cords or signal lines. The arrangement of the hole diameter or number of holes must be instructed by the user.
High-quality fixed movable wheels are installed at the bottom of the machine, which can easily move the machine to a designated location and finally fix the casters.
Heating and cooling system
. Using far-infrared nickel alloy high-speed heating electric heating wire
. Completely independent system, does not affect low temperature test and ozone aging test
. Temperature control output power is uniform Calculated by microcomputer to achieve high precision and high efficiency of electricity consumption
. Compressor: fully enclosed French Taikang set
. Refrigeration method: air cooling
. Refrigerant:
. All system pipelines are tested for ventilation and pressure leak detection
. Heating and cooling systems are completely independent
. Internal spiral refrigerant copper pipe
. Slope type evaporator
. Drying The filter, refrigerant flow window, repair valve, oil separator, solenoid valve, and liquid storage cylinder are all imported original parts.
Control system
The temperature, humidity and concentration control part of the equipment adopts a programmable controller imported from Taiwan, with simple programming, stable temperature, humidity and concentration control, and large-screen touch screen display and operation. The main electrical components of the equipment, such as circuit breakers, AC contactors, and small relays, are all of Schneider brand, and other electrical accessories are of well-known domestic brands.
The time controller of the equipment controls the time required for the test and is easy to operate. When the equipment reaches the set time, it will automatically stop the test and enter the equilibrium state to cool down.
Protection system
. Overall equipment overtemperature
. Overall equipment lack of phase/reverse phase
. Overall equipment overload
. Refrigeration unit overpressure
. Overall Equipment timing
. Other protections include leakage, operation instructions, automatic shutdown after fault alarm, etc.
Ozone generator
The electrode adopts quartz glass tube electrode with welding process. It has no impurities and no glue sealing. It is not easy to cause electrode breakdown and aging. The electrode has long service life, and high-frequency surface discharge ceramic corona occurs. The electrodes are limited by the manufacturing process of the ceramic substrate. When used under different environmental humidity conditions, the electrodes are easily broken down.
Due to the medium-frequency and high-voltage power supply mode, the electrode will not produce corona overheating, making the ozone concentration generated stable, and will not cause the ozone concentration to decrease with the working time or the level of gas flow. Since the high-frequency surface discharge ceramic corona generator uses high-frequency voltage discharge, when the temperature in the discharge area cannot be effectively dissipated, ozone will be decomposed due to overheating, so it is suitable to be used under high airflow conditions.
It has no wearing components, maintenance-free operation and long service life. However, the surface of the ceramic electrode of the high-frequency surface discharge ceramic corona generator is prone to oxidation attachments. When the surface oxide is too thick, corona blockage is likely to occur. If not cleaned in time, ozone will not be generated.